KR102663385B1 - Water inflow prevention and water drainage structure of speaker unit - Google Patents

Abstract

The present invention can meet the trend of users preferring products that can be worn in any weather in TWS, which is becoming a product closely related to everyday life. It has good waterproof performance even in rainy weather, allowing outdoor activities without burden, and the product is perfect. It provides a waterproof and water-repellent structure for the speaker, allowing it to be reused even when submerged.

Description

Waterproof and water-repellent structure of speaker unit {Water inflow prevention and water drainage structure of speaker unit}

The present invention relates to a waterproof and water-repellent structure of a speaker unit.

Since the microspeaker communicates with the outside to transmit sound, water is bound to enter the inside of the device when it gets wet or submerged in a rainy environment or in an accident, so it must have excellent waterproof and water-repellent performance to prevent performance deterioration.

Many waterproof and water-repellent structures have been proposed for microspeakers. In particular, in the case of a 2-way speaker that functions as both a woofer and a tweeter, there are more parts (openings or holes) that communicate with the outside than a single speaker, so it is necessary to precisely design the water-repellent structure.

The applicant proposed a waterproof and water-repellent structure for a 2-way speaker in Patent Nos. 10-2203376 and 10-260759. These patents suggest a waterproof path between the woofer diaphragm and the tweeter diaphragm, but do not propose a waterproof path between the woofer diaphragm and the grille or the tweeter diaphragm itself. In addition, the waterproof path was concentrated on the side or bottom of the speaker, and it was unclear where the water repellent outlet should be installed in terms of the overall structure of the speaker.

The purpose of the present invention is to provide a waterproof and water-repellent structure for a speaker unit in a 2-way speaker that allows water to flow freely and has excellent waterproof and water-repellent performance.

In order to achieve the above-described object, the present invention provides a waterproof and water-repellent structure for a 2-way speaker, wherein the exterior of the speaker is formed by a case, a woofer diaphragm is located at the top of the speaker, a tweeter diaphragm is located at the bottom, and the boundary of the woofer diaphragm is On the bottom, the woofer voice coil extends downward, and on the top of the tweeter diaphragm, the tweeter voice coil extends upward. A grill is installed surrounding the entire top of the woofer diaphragm, and the edge of the grill is firmly coupled to the edge dome of the woofer diaphragm. In the area of the upper surface of the grill, a plurality of upper slots are perforated at predetermined intervals, and a mesh is installed on the upper surface of the upper slot to provide a waterproof and water-repellent structure for the upper part of the speaker. .

The center of the tweeter diaphragm can be opened to provide a waterproof and water-repellent structure for the lower part of the speaker.

A first upper plate and a first magnet are sequentially stacked in the inner space formed by the woofer voice coil, and a second upper plate and a second magnet are sequentially stacked between the outside of the woofer voice coil and the case, and these members are composed of a woofer diaphragm and a predetermined They are arranged at intervals to provide space for the woofer, and the first upper plate consists of a central column that provides an empty space, a plate portion that extends horizontally from the top of the central column to the side and covers the upper surface of the first magnet, and the central The upper surface of the column is open and closed by a cap, a first lower plate is disposed on the top adjacent to the tweeter diaphragm, the edge portion outside the tweeter diaphragm is pressed to support the lower surface of the first lower plate, and the second lower plate is It is spaced a predetermined distance from the first lower plate and supports the lower surface of the second magnet at the same height, and the inner surfaces of the second upper plate, the second magnet, and the second lower plate are aligned, and the first upper plate, the first magnet, and The outer surface of the first lower plate is also aligned, and a space of a predetermined size is formed between the inner and outer surfaces to provide a second passage.

The outer surfaces of the second upper plate, the second magnet, and the second lower plate and the lower part of the case may be spaced apart at a predetermined distance to provide a first passage.

A plurality of lower slots are formed on the bottom of the case, and the lower slots may communicate with both the first passage and the second passage.

The upper ends of the first passage and the second passage may be in communication with the woofer space.

In addition, the present invention relates to a waterproof and water-repellent structure of a 2-way speaker, in which the exterior of the speaker is formed by a case, a woofer diaphragm is located at the top of the speaker, a tweeter diaphragm is located at the bottom, and a woofer voice coil is located on the bottom of the boundary of the woofer diaphragm. It extends to the lower part, and the tweeter voice coil extends upward from the upper surface of the tweeter diaphragm. The first upper plate and the first magnet are sequentially stacked in the inner space formed by the woofer voice coil, and between the outside of the woofer voice coil and the case. A second upper plate and a second magnet are sequentially stacked, and these members are arranged at a predetermined distance from the woofer diaphragm to provide space for the woofer. A first lower plate is disposed on the top adjacent to the tweeter diaphragm, and the tweeter diaphragm is The outer edge portion is pressed to support the lower surface of the first lower plate, and the second lower plate is spaced a predetermined distance from the first lower plate to support the lower surface of the second magnet at the same height. The second upper plate and the second magnet And a space of a predetermined size is formed between the inner surface of the second lower plate and the first upper plate, the first magnet, and the outer surface of the first lower plate to provide a second passage, and the second upper plate, the second magnet, and The outer surface of the second lower plate and the lower part of the case are spaced apart at a predetermined distance to provide a first passage, and a plurality of lower slots are formed on the bottom of the case, and the lower slots communicate with both the first passage and the second passage. Provides waterproof and water-repellent structure for 2-way speakers.

The present invention can meet the trend of users preferring products that can be worn in any weather in TWS, which is becoming a life-friendly product. In particular, the product has good waterproof performance even in rainy weather, allowing outdoor activities without burden. This has the effect of being reusable even when completely submerged.

The present invention has the effect of providing a speaker that is waterproof while allowing water to freely flow in and out of all spaces inside the speaker unit.

1 is a cross-sectional view of a speaker showing the waterproof and water-repellent structure of the present invention;
Figure 2 is a perspective view of the speaker of Figure 1 viewed from the top where the woofer speaker is located;
Figure 3 is a perspective view of the speaker of Figure 1 viewed from the bottom where the tweeter diaphragm is located;
Figure 4 is a diagram explaining the waterproof function of the speaker of the present invention by zone; and
Figure 5 is a frequency-sound pressure graph comparing the results before and after an immersion test of a speaker equipped with the waterproof structure of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 1 is a cross-sectional view of the speaker 1 showing the waterproof and water-repellent structure (hereinafter sometimes abbreviated as “waterproof structure”) of the present invention. FIG. 2 is a perspective view of the speaker 1 in FIG. 1 viewed from the top where the woofer speaker is located, and FIG. 3 is a perspective view of the speaker 1 in FIG. 1 viewed from the bottom where the tweeter diaphragm is located. The upper part where the woofer speaker is located in FIG. 1 is a cross-sectional view cut along line AA in FIG. 2. The lower part where the tweeter speaker is located in FIG. 1 is a cross-sectional view cut along line BB in FIG. 3. Below, description of parts not directly related to the waterproof structure will be omitted.

The speaker of the present invention is based on the premise of a 2-way speaker. It is especially suitable for TWS speakers. The exterior of the speaker 1 is formed by the case 2. The speaker 1 is shown as a circular shape, but can also be applied to a rectangular structure. The woofer diaphragm (4) is located at the top of the speaker (1), and the tweeter diaphragm (6) is located at the bottom. The woofer voice coil (8) extends downward from the bottom of the border of the woofer diaphragm (4), and the tweeter voice coil (22) extends upward from an appropriate location on the upper surface of the tweeter diaphragm (6).

First, the upper structure of the speaker 1 of the present invention will be described.

A grill (G) is installed surrounding the entire upper part of the woofer diaphragm (4). The edge of the grill (G) is firmly coupled to the edge dome of the woofer diaphragm (4). As shown in FIG. 2, a plurality of upper slots 50 form an arc at predetermined intervals in the side area of the grill G, specifically in the area overlapping the edge dome of the woofer diaphragm 4 when viewed from the height direction. It is perforated to The upper slot 50 functions as a waterproof hole and at the same time as a sound emission outlet that emits woofer sounds. A mesh (M) is installed on the upper surface of the upper slot 50 to control ventilation and negative pressure. The mesh (M) may be manufactured integrally in a ring shape.

Next, the lower structure of the woofer diaphragm 1 of the speaker 1 of the present invention will be described.

The first upper plate 14 and the first magnet 10 are sequentially stacked in the inner space formed by the woofer voice coil 8. A second upper plate 34 and a second magnet 12 are sequentially stacked between the outside of the woofer voice coil 8 and the case 2. The plates 14 and 34 are arranged to be spaced apart from the woofer diaphragm 4 at a predetermined distance. The entire space formed by the woofer diaphragm 4 and the upper surfaces of these members will be abbreviated as “woofer space.”

The first upper plate 14 consists of a central column 140 that provides an empty space, and a plate portion 142 that extends horizontally from the top of the central column 140 to the side and covers the upper surface of the first magnet 10. . The upper surface of the central column 140 is open and closed by the cap 30. The central column 140 extends downward to the bottom of the internal space formed by the tweeter voice coil 22, and its lower end is adjacent to the upper surface of the tweeter diaphragm 6. The center of the tweeter diaphragm 6 is open.

A first lower plate 40 is disposed on the upper side adjacent to the tweeter diaphragm 6. The outer edge of the tweeter diaphragm (6) is compressed to support the lower surface of the first lower plate (40), and the upper surface of the first lower plate (40) supports the lower surface of the first magnet (10). Additionally, the second lower plate 42 is spaced apart from the first lower plate 40 by a predetermined distance and supports the lower surface of the second magnet 12 at the same height as the latter. The inner surfaces of the second upper plate 34, the second magnet 12, and the second lower plate 42 are aligned, and the first upper plate 14, the first magnet 10, and the first lower plate 40 ) The outer surface is also aligned, and a space of a predetermined size is formed between the inner and outer surfaces, which functions as a waterproof passage.

FIG. 1 is a cross-sectional view including the external terminal 200 of FIG. 3. Therefore, on the right side of FIG. 1, the external terminal 200 extends downward along the inner side of the case 2 and is then bent to form the second magnet 12. The bottom is supported.

A ring-shaped upper ring (12a) is installed surrounding the outer circumference of the second upper plate (34) and the second magnet (12), and a lower ring (42a) is installed surrounding the outer circumference of the second lower plate (42). do. The outer surfaces of the upper ring 12a and the lower ring 42a are spaced apart from the lower part 2a of the case 2 at a predetermined distance to provide a waterproof passage.

As shown in FIG. 3, the lateral area of the bottom surface 2c of the case 2, specifically the area formed by the inner surface of the second lower plate 42 from the edge dome of the tweeter diaphragm 6, is viewed from the height direction. In the overlapping area, a plurality of lower slots 60 are drilled at predetermined intervals to form an arc. The lower slot 60 is a passage for the inflow and discharge of water and at the same time a passage for radiating the sound of the woofer.

The following is clear from the structure of the speaker 1 of the present invention, but based on this, the waterproof structure and function will be described in more detail.

First, as shown in FIG. 4(a), in the upper structure of the speaker 1, even if water flows in through the upper slot 50, it is repelled or drained through the upper slot 50 and is dissipated by the woofer diaphragm 4. Since it is blocked and cannot flow to the bottom, you can expect a quick and reliable waterproofing effect.

As shown in FIG. 4(b), with respect to the tweeter diaphragm 6 among the lower structures of the speaker 1, even if water flows in through the lower slot 60, water is repelled or drained through the lower slot 60. Since it is blocked by the first upper plate 14 and the cap 30 and cannot flow upward, a quick and reliable waterproofing effect can be expected.

As shown in FIG. 4(c), the remaining structure of the speaker 1, the waterproof structure of the lower and side surfaces, consists of the lower slot 60 of the bottom surface 2c of the case 2, the upper ring 12a, and the lower As a result of the outer surface of the ring 42a being spaced apart from the lower part 2a of the case 2, the first passage P1, the second upper plate 34, the second magnet 12, and A second passage (P2) provided between the inner surface of the second lower plate 42, the first upper plate 14, the first magnet 10, and the outer surface of the first lower plate 40, and the woofer It includes space.

The water flowing in through the lower slot 60 flows upward through the first passage (P1) and the second passage (P2) and flows through the woofer space before flowing into the passage (P1, P2) into which it flows or the lower slot on the other side. It drains or discharges water toward other passages (P1, P2) formed by connecting to (60). It can be seen that even if water enters through any lower slot 60 throughout the entire 360 degrees of the speaker 1, it can provide a path for water to flow and escape.

In this way, according to the present invention, even if the speaker (1) is completely submerged in water, a passage is provided for water to flow freely within a certain section of the speaker (1), so there is a decrease in sound quality or damage to parts that occurs due to water stagnating or remaining for a long time. Breakdowns can be prevented. Therefore, you can wear the speaker and engage in outdoor activities without any problems even in a rainy environment, and you can expect the effect of being able to reuse the speaker even if it is completely submerged.

Figure 5 is a frequency-sound pressure graph of the speaker 1 of the present invention described above under normal conditions, and a frequency-sound pressure graph measured after the speaker 1 was completely immersed in water and subjected to an IPX7 immersion test. Comparison tests were conducted a total of 6 times. In the graph, “UPPER” and “LOWER” are the upper and lower limits that satisfy the quality conditions at each frequency.

It can be confirmed that the sound quality of the speaker 1 of the present invention shows almost no change before and after immersion and that it satisfies all minimum quality conditions.

Although the preferred embodiment of the present invention has been described above, various changes and modifications can be made to the present invention. For example, the bottom surface 2c of the case 2 was used, but a cover or frame other than the case 2 may be installed and the lower slot 60 may be formed there. It is obvious that the scope of the present invention extends to the same or equivalent area as the claims described below.

Claims (7)

In the waterproof and water-repellent structure of the 2-way speaker, the exterior of the speaker is formed by a case, the woofer diaphragm is located at the top of the speaker, the tweeter diaphragm is located at the bottom, and the woofer voice coil extends downward from the boundary of the woofer diaphragm. , On the upper surface of the tweeter diaphragm, the tweeter voice coil extends upward,
A grill is installed surrounding the entire top of the woofer diaphragm, and the edge of the grill is firmly coupled to the edge dome of the woofer diaphragm.
A plurality of upper slots are perforated at predetermined intervals in the upper area of the grill, and a mesh is installed on the upper surface of the upper slots to provide a waterproof and water-repellent structure for the upper part of the speaker.
A first upper plate and a first magnet are sequentially stacked in the inner space formed by the woofer voice coil, and a second upper plate and a second magnet are sequentially stacked between the outside of the woofer voice coil and the case, and the first and second upper plates is placed at a predetermined distance from the woofer diaphragm to provide space for the woofer,
The first upper plate consists of a central column that provides an empty space, and a plate portion that extends horizontally from the top of the central column to the side and covers the upper surface of the first magnet, and the upper surface of the central column is open and closed by a cap,
A first lower plate is disposed at the top adjacent to the tweeter diaphragm, the edge portion outside the tweeter diaphragm is pressed to support the lower surface of the first lower plate, and the second lower plate is spaced a predetermined distance from the first lower plate at the same height. The lower surface of the second magnet is supported, and the inner surfaces of the second upper plate, second magnet, and second lower plate are aligned, and the outer surfaces of the first upper plate, first magnet, and first lower plate are also aligned, and the inner and outer sides are aligned. The waterproof and water-repellent structure of a 2-way speaker in which a space of a certain size is formed between them to provide a second passage. According to clause 1,
The center of the tweeter diaphragm is open, providing a waterproof and water-repellent structure for the lower part of the speaker. The waterproof and water-repellent structure of the 2-way speaker. delete In paragraph 1
A waterproof and water-repellent structure of a 2-way speaker in which the outer surfaces of the second upper plate, second magnet, and second lower plate and the lower part of the case are spaced apart at a predetermined distance to provide a first passage. In clause 4
A waterproof and water-repellent structure of a 2-way speaker in which a plurality of lower slots are formed on the bottom of the case, and the lower slots communicate with both the first passage and the second passage. In clause 5
The top of the first passage and the second passage are connected to the woofer space, and the waterproof and water-repellent structure of the 2-way speaker. In the waterproof and water-repellent structure of the 2-way speaker, the exterior of the speaker is formed by a case, the woofer diaphragm is located at the top of the speaker, the tweeter diaphragm is located at the bottom, and the woofer voice coil extends downward from the boundary of the woofer diaphragm. , On the upper surface of the tweeter diaphragm, the tweeter voice coil extends upward,
A first upper plate and a first magnet are sequentially stacked in the inner space formed by the woofer voice coil, and a second upper plate and a second magnet are sequentially stacked between the outside of the woofer voice coil and the case, and the first and second upper plates is placed at a predetermined distance from the woofer diaphragm to provide space for the woofer,
A first lower plate is disposed at the top adjacent to the tweeter diaphragm, the edge portion outside the tweeter diaphragm is pressed to support the lower surface of the first lower plate, and the second lower plate is spaced a predetermined distance from the first lower plate at the same height. Supports the lower surface of the second magnet,
A space of a predetermined size is formed between the inner surface of the second upper plate, the second magnet, and the second lower plate and the outer surface of the first upper plate, the first magnet, and the first lower plate to provide a second passage;
The outer surfaces of the second upper plate, second magnet, and second lower plate and the lower part of the case are spaced apart at a predetermined distance to provide a first passage.
A waterproof and water-repellent structure of a 2-way speaker in which a plurality of lower slots are formed on the bottom of the case, and the lower slots communicate with both the first passage and the second passage.